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This paper presents a post-silicon debug methodology that provides a means to rewind, or backspace, a chip from a known crash state using a combination of on-chip real-time data collection and off-chip formal analysis methods. A complete debug flow is presented that considers practical considerations such as area, on-chip non-determinism and signal propagation delay. This flow, along with a low-overhead...
This paper presents TAB-BackSpace, our novel scheme to provide the effect of an unlimited-length trace buffer with no on-chip overhead beyond the existing debug logic. We present the theoretical foundation of our work, simulation studies on how we reduce the possibility of computing an erroneous trace, and results from the bring-up lab on real silicon of an IBM POWER7 processor, where TAB-BackSpace...
We present PREACH, an industrial strength distributed explicit state model checker based on Murphi. The goal of this project was to develop a reliable, easy to maintain, scalable model checker that was compatible with the Murphi specification language. PREACH is implemented in the concurrent functional language Erlang, chosen for its parallel programming elegance. We use the original Murphi front-end...
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